Species of Ceriaguon from West u\/n'ca. 279 



greenish yellow. Aiitennre yellow at base, then reddish 

 brown. Protlionix dark greenish yellow. Upper surJace of 

 tliorax proi)er also dark greenish yellow, with an ante- 

 humeral golden stripe, not reaching to the anterior margin of 

 the thorax. (On the right side this antehunieral stripe is not 

 well developed.) Sides and under surface of thorax pale 

 greenish yellow. Legs yellow; spines and apex of tarsus 

 and of claws black. Wings conspicuously yellow ; reticula- 

 tion for the most part reddish. Pterostigma greenish yellow, 

 bounded by black nervures. Arculus in all wings a little 

 distal to the second autenodal. A* in all wings originating 

 a little before the level of the cubito-anal cross-vein. 10 

 postnodals in fore wings and 8 in hind wings. Abdomen : 

 sogments 1 to 5 and nearly the whole of G pale lemou; from 

 the apex of segment G to the end of the abdomen reddish 

 brown, tending to black on 8. Excision in the apical margin 

 of 10 V-shaped, deep, reaching to about the middle of the 

 segment. The upper anal appendages blackish, stout, 

 pointed, curving abruptly downwards, and conspicuously 

 shorter than the lower, which they touch. The lower 

 a))pendages reddish brown ; viewed in profile wide, longer 

 than segment 10, directed uj)wards, produced into a black- 

 tipped point above; in dorsal aspect conical, directed back- 

 wards. 



In general appearance this species resembles Ceriagrion 

 coromandelianiim, Fabr., from India, but may be readily 

 distinguished from it by its smaller size and the yellow 

 coloration of the wings. 



Southern Nigeria: 1 ^, Lagos {Dr. II. Strachan)^ 

 British Museum, no. 9ci-lG5. 



Ceriagrion coralUnwn, sp. n. 



c? adult (holotype). — Total length of abdomen 2G mm. ; 

 lenijth of hind winy; 17 mm. 



Labium pale yellow. Labrum, anteclypeus, and anterior 

 portion of frons greenisli yellow. Gense pale green. Post- 

 clypeus, posterior portion of frons, and superior surface of 

 head reddish brown. Back of head ochraceous. Antenme 

 yellowish brown at base; the bristle black. Prothorax 

 yellowish, variegated with greenish. Thorax: Tnid-dorsal 

 carina dark green, with a rather broad stiipe of goldi-n yellow 

 on each side ; between this stripe and the humeral suture a 

 broader band of dark green ; sides of thorax pale green ; 

 under surface whitish. Legs brownish yellow ; spines, 

 apex of tarsi, and tips of claws black. Wings entirely 



19* 



